The oil obtained from both the leaves and flowers ofCallistemon citrinus(Curtis) Sheels (syn.C. lanceolatusDC) was subjected to gas chromatographic analysis. Of the sixteen compounds identified, 1, 8-cineole and α-terpineol were found to predominate. Furthermore, quantitative variations were found between leaf and flower oils so that flower oils could be differentiated based on their richness in α-pinene (15.1–42.7% vs 0.6–3.2%) and their decrease in α-terpineol content (5.2–17.5% vs 31.0–31.9%).